Method of manufacturing connecting pins



July 24, 1923 1,462,876

E. M. SUMMERHAYS METHOD OF MANUFACTURING CONNECTING PINS Filed Jan. 27.1922 flis'; J.

WITNESSESS INVENTOR MQ' 6Z4. 4 M6 61 ,1

. ATTORNEYS Patented July 2%, i923.

insane are.

ELIVIER M. SUMMERHAYS, OF HAMMOND, INDIANA, ASSIGNOR T FREDERICSfiI-IAE- FEE, OF PITTSBURGH, PENNSYLVANIA.

METHOD OF MANUFACTURING CONNECTING PINS.

Application filed January 27, 1922. Serial No. 532,320.

To all whom it may concern:

Be it known that 1, Emma M. SUMMER- HAYS. a citizen of the UnitedStates, and a resident of Hammond, in the county of Lake a and State ofIndiana, have invented a new and useful Improvement in Methods ofManufacturing Connecting Pins, of which the following is aspecification.

The invention relates to the manufacture of pins having forged enteringends, and heads at their other ends, and particularly to the manufactureof connecting pins similarly characterized, now used in railway brakeoperating equipment. Such connect- 1e ing pins are provided at the sidesof their entering ends with grooves connected to each other at theirinner ends by holes extending through the body of the pins, in whichholes and grooves there are placed strips of bendable metal adapted tobe turned outwardly tohold the pins in place.

In the manufacture of these pins'two operations are required, one toforge the entering end of the pin, and the other to upset its oppositeend to form a head. This is objectionable not only because of themanufacturing cost involved in the two operations, but also in the caseof the connecting pins because their upset heads contain more metal thanis required to make them of a strengthcommensurate with the holdingpower of the strip of bendable metal at the other end.

The object of this invention is to provide a method of manufacturingheaded pins having forged ends in general, and in particular headedconnecting pins having grooves formed at their entering ends, wherebythe heads of the pins may be 4.0 formed simultaneously with the forgingof the other ends and the heads reduced in si-fle', with the result thatthe cost of manufacture may be materially reduced.

The invention may be best explained with reference to the accompanyingdrawings, Fig. 1 is a side view of a connecting pin of the characterexplained above; Fig. 2 an end view of the head of the pin; Fig. 3 alongitudinal sectional view of the pair of pin; and Fig. 4: a plan viewof one of the dies in Fig. 3.

In the practice of the invention in its applicability to the manufactureof pins of the type illustrated in Fig. 1, a head is formed at the endof a pin by means of the same dies that are used. for forging thegrooves and hole in the entering end of the pin. A

cylindrical blank of proper length is heated and placed between a pairof dies formed at one end for forging the grooves and hole in theentering end of the pin, and formed at their other end to spread theopposite end of the blank laterally to form an elongate head overhangingthe body of the pin.

is formed in the die portions 4: by spreading the metal laterally.

As shown in Figs. 1 and 2 the pin thus formed comprises a cylindricalbody portion 5, side grooves 6 at its entering end having a holeconnecting the inner endsof the grooves to each other, and a head 8. Thehead being of elongate form and overhanging the body 5 of the pin onlyat its ends, contains much less metal than the round heads heretoforeformed by upsetting the ends of the pins. The pin is much moreeconomical to manufacture than those heretofore produced, both becauseof the smaller amount of metal used and of the elimination of thehead-forming operation as a step in addition to the forging of theentermg end. In finished form the pin is provided with a strip 9 ofbendable metalflwhich extends through the hole 7 and lies in the grooves6 so that the pin may be readily inserted through the holes in membersit is intended to connect.

I claim:

1. The method of forming a cylindrical blank and in a single operation aheaded pin so forging dies used in the manufacture of the having aforged entering end, which comprises spreading laterally, by the samedies for forging the grooves in the entering end used for forging theentering end of the of the pin, the other end of the blank to pin, theother-end of the blank to form an form an elongate head having its endsoverelongate head overhanging the body of the hanging the body of thepin.

5 pin. In testimony whereof, I sign my name.

2. The method of forming from aheated ELMER M. SUh/IMERHAYS. cylindricalblank and ina single operation a headed connecting pin having a forged IWitnesses: groove at its entering end, which comprises Jos. THOMPSON,

10 spreading laterally, by the same dies used 'H. E. RICE.

